fio: (g=0): rw=randrw, bs=4K-256K/4K-256K, ioengine=posixaio, iodepth=8
...
fio: (g=0): rw=randrw, bs=4K-256K/4K-256K, ioengine=posixaio, iodepth=8
Starting 3 threads
Threads: 3
Threads: 3
Threads: 3: [mmm] [13.6% done] [ 15407/  6662 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [17.4% done] [ 13153/  7029 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [20.8% done] [  6626/ 11559 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [  9041/  9065 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [ 12454/  6861 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [32.0% done] [ 13894/  2822 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [34.6% done] [  5901/  9229 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [38.5% done] [ 10197/  5560 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [42.3% done] [ 10971/  5461 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [ 11742/  4706 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [  8602/  5445 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.9% done] [  9534/  2525 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.6% done] [ 11254/   719 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [57.1% done] [  7610/  2828 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  6282/  3287 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  6613/  2473 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=2666, got signal=6
Threads: 2: [mm_] [61.3% done] [  6196/  2064 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=2665, got signal=6
Threads: 1: [m__] [64.5% done] [  5759/  1871 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=2664, got signal=6

fio: (groupid=0): err= 0: pid=2664
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.7%, 8=94.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.0%, 50=17.8%, 100=31.1%
     lat (msec): 250=48.4%, 500=0.9%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=2665
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=7.0%, 8=92.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.4%, 20=2.9%, 50=9.5%, 100=45.1%
     lat (msec): 250=41.0%, 500=0.5%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=2666
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=5.7%, 8=94.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.1%, 20=1.5%, 50=8.0%, 100=53.4%
     lat (msec): 250=36.6%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3747/2382, merge=411/166, ticks=43268/34264, in_queue=77524, util=99.30%
0.18user 0.27system 0:21.28elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
383224inputs+230808outputs (0major+2454minor)pagefaults 0swaps